I had the same issue with this theme. The index.html file is empty, I just renamed it and it’s working again. The theme author doesn’t seem to exist anymore, the company that acquired them canceled all support, so it won’t ever get fixed on their side.
Nevermind, see that I can put an IP address in the exclude list.
Nevermind, someone set DISALLOW_FILE_EDIT and DISALLOW_FILE_MODS to true. Set them to false and now it shows up.